Thunderstorm Wind, Jo Daviess
- When
- August 16, 4:45 PM CST
- Where
- Jo Daviess County
- Measured
- 62 kt (71 mph)
- Coordinates
- 42.370, -90.250
Tornado and Hail in Illinois, August 16, 1987
20 thunderstorm wind, 2 hail, 1 tornado, as filed by the National Weather Service.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 59
- Property damage
- $250,000
- Crop damage
- None recorded
- Events
- 23
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
Event by event
20 thunderstorm wind, 2 hail, 1 tornado. Local standard time, as filed.
Thunderstorm Wind, Stephenson
- When
- August 16, 5:05 PM CST
- Where
- Stephenson County
- Measured
- 58 kt (67 mph)
- Injuries
- 1 direct, 0 indirect
- Coordinates
- 42.380, -89.830
Thunderstorm Wind, Winnebago
- When
- August 16, 5:30 PM CST
- Where
- Winnebago County
- Coordinates
- 42.320, -89.130
Thunderstorm Wind, Rock Island
- When
- August 16, 5:52 PM CST
- Where
- Rock Island County
- Measured
- 50 kt (58 mph)
- Coordinates
- 41.450, -90.520
Thunderstorm Wind, Adams
- When
- August 16, 6:00 PM CST
- Where
- Adams County
- Measured
- 65 kt (75 mph)
- Coordinates
- 39.930, -91.400
Thunderstorm Wind, Rock Island
- When
- August 16, 6:15 PM CST
- Where
- Rock Island County
- Coordinates
- 41.550, -90.650
Thunderstorm Wind, Henry
- When
- August 16, 6:15 PM CST
- Where
- Henry County
- Coordinates
- 41.370, -90.130
Thunderstorm Wind, Whiteside
- When
- August 16, 6:15 PM CST
- Where
- Whiteside County
- Coordinates
- 41.750, -89.900
Thunderstorm Wind, Henry
- When
- August 16, 6:30 PM CST
- Where
- Henry County
- Coordinates
- 41.230, -89.930
Thunderstorm Wind, De Kalb
- When
- August 16, 7:00 PM CST
- Where
- De Kalb County
- Coordinates
- 41.930, -88.870
Thunderstorm Wind, Boone
- When
- August 16, 7:00 PM CST
- Where
- Boone County
- Coordinates
- 42.320, -88.780
Thunderstorm Wind, Lee
- When
- August 16, 7:10 PM CST
- Where
- Lee County
- Measured
- 68 kt (78 mph)
- Coordinates
- 41.730, -89.250
Thunderstorm Wind, Ogle
- When
- August 16, 7:10 PM CST
- Where
- Ogle County
- Measured
- 68 kt (78 mph)
- Coordinates
- 42.050, -89.280
Thunderstorm Wind, Sangamon
- When
- August 16, 8:32 PM CST
- Where
- Sangamon County
- Measured
- 70 kt (81 mph)
- Injuries
- 58 direct, 0 indirect
- Coordinates
- 39.800, -89.650
Thunderstorm Wind, La Salle
- When
- August 16, 8:50 PM CST
- Where
- La Salle County
- Coordinates
- 41.280, -88.870
Tornado, La Salle
- When
- August 16, 9:15 PM CST
- Where
- La Salle County
- Rating
- F2
- Path length
- 1 mi
- Path width
- 10 yd
- Property damage
- $250,000
- Coordinates
- 41.370, -88.850
Hail, Logan
- When
- August 16, 9:30 PM CST
- Where
- Logan County
- Measured
- 0.75 in hail
- Coordinates
- 40.150, -89.330
Thunderstorm Wind, Menard
- When
- August 16, 9:30 PM CST
- Where
- Menard County
- Measured
- 65 kt (75 mph)
- Coordinates
- 40.050, -89.770
Thunderstorm Wind, Putnam
- When
- August 16, 9:50 PM CST
- Where
- Putnam County
- Coordinates
- 41.030, -89.280
Thunderstorm Wind, Cook
- When
- August 16, 10:10 PM CST
- Where
- Cook County
- Measured
- 65 kt (75 mph)
- Coordinates
- 41.880, -87.600
Hail, Cook
- When
- August 16, 10:32 PM CST
- Where
- Cook County
- Measured
- 0.75 in hail
- Coordinates
- 41.980, -87.900
Thunderstorm Wind, Grundy
- When
- August 16, 10:35 PM CST
- Where
- Grundy County
- Measured
- 51 kt (59 mph)
- Coordinates
- 41.370, -88.420
Thunderstorm Wind, Lake
- When
- August 16, 11:30 PM CST
- Where
- Lake County
- Measured
- 65 kt (75 mph)
- Coordinates
- 42.330, -87.980
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Damaging Winds in Wisconsin, August 16, 1987
- Hail and Damaging Winds in Missouri, August 16, 1987
- Tornado in Montana, August 16, 1987
- Hail and Damaging Winds in Iowa, August 16, 1987
- Hail and Damaging Winds in Oklahoma, August 16, 1987
- Damaging Winds in Indiana, August 16, 1987
- Damaging Wind in Minnesota, August 16, 1987
- Damaging Wind in Texas, August 16, 1987
- Damaging Wind in Arkansas, August 16, 1987
- Damaging Wind in Michigan, August 16, 1987
More
Every storm in Illinois in 1987Every state in 1987This day in weather historyThe tornado archive for Illinois, 1987Warnings in Illinois, August 1987
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 10005980, 10005981, 10005982, 10005983, 10005984, 10005985, 10005986, 10005987, 10005988, 10005989, 10005990, 10005991, 10005992, 10005993, 10005994, 10005995, 10005996, 10005997, 10005998, 10005999, 10006000, 10006001, 10006002.